SpringBoot_Lesson1_Sample1

Propmt for the Code Agent (Codex, Gemini Code Assistant or Copilot)

Context:

You are an expert Java developer. We are creating a simple command-line application to demonstrate the problem of tight coupling.

We will not use Spring or any frameworks for this part. The application will have a message service that is directly created by the main application class.

Task:

Create a simple Maven project with two Java classes.

Constraints:

• Java 17

• No Spring dependencies.

Steps:

1. Generate a pom.xml for a basic Java 17 project.

2. Create a MessageService.java class with a single method public String getMessage() that returns "Hello, world!".

3. Create a MainApplication.java class with a main method.

4. Inside the main method, instantiate MessageService using the new keyword (e.g., MessageService service = new MessageService();).

5. Print the result of calling the getMessage() method to the console.

6. Provide the command to compile and run this application using Maven.

Deliverables:

• pom.xml

• src/main/java/com/example/demo/MessageService.java

• src/main/java/com/example/demo/MainApplication.java

• The mvn command to execute the application.

Acceptance Criteria:

• The project compiles successfully.

• Running the main method in your IDE or via the command line prints "Hello, world!" to the console.

• The MainApplication class explicitly contains the line new MessageService().